<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
            /* 
            ?    0-1     {0,1}
            +    大于1个  {1,}
            *  {0,}
            */
        var str = "hje1";
        var reg =/\d+/
        console.log(reg.test(str))
    </script>
</body>
</html>